Automatic wagon-brake.



P. DIHARVEY.

AUTOMATIC WAGON BRAKE.

APPLICATION HLED JUNE 3.1914.

1343,9359 Patnted (yen-23,1911,

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AUTOMATIC WAGON BRAKE.

-APPLICATION FILED JUNE 3.1914.

Patented Oct. 23, 1917.

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UTOMATIC WAGO -BRAKE.

fication of Letters Patent. 6 0E 23; 1917.,

Application filed June 3, 1914. Serial No. 842,868.

T0 all 10 7mm it may concern:

Be it known that I, PHILIP Doo'roR HAR- vEY, a citizen of the UnitedStates, residing at Stratton, inthe county of KitoCarson and State ofColorado, have invented cer tain new and useful Improvements inAutomatic YVagon-Brakes, of which the following is a specification. i

This invention relates to new and useful improvements in automatic wagonbrakes and has for its principal object to provide a simple andeffective brake which will'automatically operate with the shifting ofthe load.

Another object of the invention is to pro vide a simple and effectivebolster which will'hold the wagon body in place and still permit thesame to shift longitudinally.

A further object of the invention is to provide a bolster carryingrollers upon which the body rests to permit said body to slide.

With these and other objects in view the invention consists of the novelcombination and arrangement of parts which will be fully set forth inthe following specification and accompanying drawings, in which:

Figure 1 is a side View in elevation of a wagon constructed inaccordance with this invention.

Fig. 2 is a view similar to Fig. 1, showing the brake in operation.

Fig. 3 is an enlarged side view of a bolster.

Fig. 4: is a top plan view thereof.

Fig. 5 is an enlarged transverse sectional view taken on line 55 of Fig.3.

Fig. 6 is an enlarged sectional view taken on the line 6-6 of Fig. 4.

Referring now to the drawings by character of reference the numeral 1designates the rear wheels of a wagon while the numeral 2 designates thefront wheels thereof. These wheels are connected by the usual runninggear designated generally by the numeral 3 which comprises a reach rod4: to which the axles 5 are secured. This reach rod is preferably of theordinary construction and is arranged to be accessible to permit wagonbodies of different sizes to be used.

Secured to the axle are the usual bolsters designated generally by thenumerals 6 which comprise the ordinary transversely extending supportingelement 7 having an The ordinary reinforcing strips 9 are secured to thebolsters' and are arranged to prevent the uprights 8 from becomingdisplaced. Secured to the transverse bars 7 of the bolsters 6 is asuitable casting 10 having formed therein the long itudinal groove 11.This plate or casting 10 is also provided with the depressions 12- in'the upper. surface, as will be clearly seen upon referring to Fig. 3. A

1n the extension 17 of the strip'9,herein' before referred to. Extendingvertically through the transverse supporting members 7 are the eye bolts18 in which the trunnions 19 of the horizontal roller 20 are journaled.Secured to the reach rod 4 is a suitable journal bearing 21 in which therod 22 to which the arms 23 carrying the brake shoes 24 are secured isjournaled. A connection 25, connected to the body at 27 and to the rod22 intermediate its ends, includes a chain section which passes over apulley 26 secured to the Wagon gear. Thus it will be seen that when thewagon body shifts forward in the position illustrated in Fig. 2 theconnection will again pull on the arm and cause the brakes to beapplied.

In order to release the brake mechanism after it has once been operatedthere is provided on each of the arms 23 a suitable eye 28 to which oneend of the coil spring 29 is secured. The opposite end of the coilspring 29 is secured to the wagon body, as at 30, and it will beapparent that when the brake is applied the spring will be extended andwill exert a pull on the lever and thereby as soon as the wagon againrights itself the brake will be caused to be released.

It will be evident from the foregoing that in use when the wagonstartsdown hill, as illustrated in Fig. 2, the wagon body will shift forwardthus causing a pull on the connection which will cause the brakes to beapplied. As soon as level ground is again struck and the pressurereleased from the chain the springs 29 will cause the brake to bereleased and the wagon may proceed in the ordinary manner. With thismecha-- msm 1t 1s evident that a simple and elfective automatic brake isprovided which will operate without the necessity of any atten tion fromthe driver or user and thus safety is assured should the Weight of theload control the amount of pressure applied on the brake.

While in the foregoing there has been shown and described the preferredembodiment of this invention it is to be understood that such changes inthe combination and arrangement of parts as may fall within the scope ofthe claim may be restorted to without departing from the spirit andscope of the invention.

Having thus described the invention what is claimed as new, is

In a brake mechanism wherein the wagon body is movable relatively to thebolsters, wagon bolsters each comprising a main member, standards at theends of said member, a plate mounted on the main memher and having agroove terminating short of the ends, each end portion having a bearingto receive an upright roller, means securing the upper end of saidroller and bracing said standard, a roller mounted in said groove, aneye-bolt supporting each end of the last named roller and also servingto secure the plate to the bolster.

In testimony whereof I affix my signature in presence of two witnesses.

PHILIP DOCTOR HARVEY.

Witnesses W. E. BAKER, E. J. MALoNns.

Copies of this patent may be obtained for five cents each, by addressingthe Commissioner of Patents.

Washington, D. G.

